Uplink transmission power control in multi-carrier communication systems

ABSTRACT

Disclosed are a method and apparatus for wireless communication by and in a base station (BS) and a user equipment (UE). The method by the UE includes determining a first power for transmitting first control information on a physical uplink control channel (PUCCH), determining a second power for transmitting both first data and second control information on a first physical uplink shared channel (PUSCH), determining a third power for transmitting second data on a second PUSCH, reducing the third power if a sum of the first power, the second power and the third power exceeds a predetermined value, and transmitting at least one of the first control information on the PUCCH using the first power, the first data and the second control information on the first PUSCH using the second power, and the second data on the second PUSCH using the reduced third power.

PRIORITY

This application is a Continuation Application of U.S. patentapplication Ser. No. 14/587,461, which was filed in the U.S. Patent andTrademark Office on Dec. 31, 2014, which is a Continuation Applicationof U.S. patent application Ser. No. 12/725,847, which was filed in theU.S. Patent and Trademark Office on Mar. 17, 2010, now U.S. Pat. No.8,971,299, which issued on Mar. 3, 2015, and claims priority under 35U.S.C. §119(e) to U.S. Provisional Application No. 61/160,879, entitled“Transmission Power Control in Uplink of Multi-Carrier CommunicationSystems”, which was filed on Mar. 17, 2009, the contents of each ofwhich are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is directed generally to wireless communicationsystems and, more specifically, to transmission power control for datasignals and control signals.

2. Description of the Art

A communication system includes DownLink (DL), which supports signaltransmissions from a base station (i.e., a “Node B”) to User Equipments(UEs), and UpLink (UL), which supports signal transmissions from UEs tothe Node B. UEs, which are also commonly referred to as a terminal or amobile station, may be fixed or mobile and may include wireless devices,cellular phones, personal computer devices, etc. Node Bs are generallyfixed stations and may also be referred to as Base Transceiver Systems(BTS), access points, or other similar terminology.

UL signals contain data information, which may include Uplink ControlInformation (UCI). The UCI includes at least ACKnowledgement (ACK)signals, Service Request (SR) signals, Channel Quality Indicator (CQI)signals, Precoding Matrix Indicator (PMI) signals, or Rank Indicator(RI) signals. UCI may be transmitted individually in the Physical UplinkControl CHannel (PUCCH) or, together with other non-UCI data, in aPhysical Uplink Shared CHannel (PUSCH).

ACK signals used in association with Hybrid Automatic Repeat reQuests(HARQs), will be referred to as HARQ-ACK signals, and are transmitted inresponse to correct or incorrect reception of Transport Blocks (TBs)transmitted through a Physical Downlink Shared CHannel (PDSCH). SRsignals inform the Node B that a UE has additional data fortransmission. CQI signals inform the Node B of the channel conditionsthat a UE experiences for DL signal reception, enabling the Node B toperform channel-dependent PDSCH scheduling. PMI/RI signals inform theNode B how to combine signal transmissions to a UE through multiple NodeB antennas in accordance with a Multiple-Input Multiple-Output (MIMO)principle.

PUSCH or PDSCH transmissions are either dynamically configured through aScheduling Assignment (SA) transmitted in the Physical Downlink ControlCHannel (PDCCH) or periodically configured with parameters set throughhigher layer signaling. For example, such configuration may be performedthrough Radio Resource Control (RRC) signaling from a Node B to eachrespective UE.

A PUSCH transmission structure is shown in FIG. 1. A Transmission TimeInterval (TTI) includes one sub-frame 110, which includes two slots.Each slot 120 includes N_(symb) ^(UI) symbols. Each symbol 130 includesa Cyclic Prefix (CP) to mitigate interference due to channel propagationeffects. The signal transmission in the first slot may be located at thesame or different part of the operating BandWidth (BW) than the signaltransmission in the second slot. One symbol in each slot is used totransmit Reference Signals (RS) 140, which provide a channel estimate toenable coherent demodulation of the received data and/or UCI. Thetransmission BW includes frequency resource units, which will bereferred to as Physical Resource Blocks (PRBs). Each PRB includes N_(sc)^(RB) sub-carriers, or Resource Elements (REs), and a UE is allocatedM_(PUSCH) PRBs 150 for a total of M_(sc) ^(PUSCH)=M_(PUSCH)·N_(sc)^(RB), REs for a PUSCH transmission BW of the UE. The last symbol of thesub-frame may be used to transmit Sounding RS (SRS) 160 from at leastone UE. The SRS mainly serves to provide a CQI estimate for the ULchannel, thereby enabling the Node B to perform channel-dependent PUSCHscheduling. The Node B configures the SRS transmission parameters for aUE through RRC signaling. The number of sub-frame symbols available fordata transmission is N_(symb) ^(PUSCH)=2·(N_(symb) ^(UL)−1)−N_(SRS),where N_(SRS)=1, if the last sub-frame symbol is used for SRStransmission and N_(SRS)=0 otherwise.

FIG. 2 illustrates a PUSCH transmitter block diagram. Coded CQI bitsand/or PMI bits 205 and coded data bits 210 are multiplexed at block220. If HARQ-ACK bits are also multiplexed, data bits are punctured toaccommodate HARQ-ACK bits at block 230. SR information, if any, isincluded as part of data information. A Discrete Fourier Transform (DFT)of the combined data bits and UCI bits is then obtained at block 240,M_(sc) ^(PUSCH)=M_(PUSCH)·N_(sc) ^(RB) REs at block 250 corresponding tothe assigned PUSCH transmission BW are selected at block 255 based oninformation from the SA or from higher layer signaling, Inverse FastFourier Transform (IFFT) is performed at block 260, and finally a CP andfiltering are applied to the signal at blocks 270 and 280, respectively,before transmission at block 290. For clarity and conciseness,additional transmitter circuitry such as digital-to-analog converters,analog filters, amplifiers, and transmitter antennas are notillustrated. The encoding process for data bits and CQI and/or PMI bits,as well as the modulation process, are also omitted for clarity andconciseness. The PUSCH transmission may occur over clusters ofcontiguous REs, in accordance with the DFT Spread Orthogonal FrequencyMultiple Access (DFT-S-OFDM) principle, which allows signal transmissionover one cluster 295A (also known as Single-Carrier Frequency DivisionMultiple Access (SC-FDMA)), or over multiple clusters 295B.

At the receiver, reverse (complementary) transmitter operations areperformed. FIG. 3 illustrates the reverse transmitter operations of thetransmitter operations illustrated in FIG. 2. After an antenna receivesthe Radio-Frequency (RF) analog signal at 310, which may be processed byprocessing units such as filters, amplifiers, frequency down-converters,and analog-to-digital converters (not illustrated), a digital signal isfiltered at block 320 and the CP is removed at block 330. Subsequently,the receiver unit applies a Fast Fourier Transform (FFT) at block 340,selects 345 the M_(sc) ^(PUSCH)·M_(PUSCH)·N_(sc) ^(RB) REs 350 used bythe transmitter, applies an Inverse DFT (IDFT) at block 360, extractsthe HARQ-ACK bits and places respective erasures for the data bits atblock 370, and de-multiplexes, at block 380, output of block 370 intodata bits 390 and CQI/PMI bits 395. Regarding the transmitter, wellknown receiver functionalities such as channel estimation, demodulation,and decoding are not shown for clarity and conciseness.

A structure for the HARQ-ACK signal transmission in the PUCCH in onesub-frame slot is illustrated in FIG. 4. A transmission in the otherslot, which may be at a different part of the operating BW, may have thesame structure as the slot illustrated in FIG. 4, or alternatively, aswith the PUSCH, the last symbol may be punctured to transmit SRS. ThePUCCH transmission for each UCI signal is assumed to be within one PRB.The HARQ-ACK transmission structure 410 includes the transmission ofHARQ-ACK signals and RS. The HARQ-ACK bits 420 are modulated, at block430, according to a “Constant Amplitude Zero Auto-Correlation (CAZAC)”sequence 440, for example with Binary Phase Shift Keying (BASK) orQuaternary Phase Shift Keying (QPSK) modulation, which is thentransmitted after performing the IFFT operation. Each RS 450 istransmitted through the unmodulated CAZAC sequence.

A structure for the CQI/PMI transmission in the PUCCH in one sub-frameslot is illustrated in FIG. 5. The CQI transmission structure 510includes the transmission of CQI signals and RS. The CQI bits 520 againare modulated, at block 530, according to a CAZAC sequence 540, forexample using QPSK modulation, which is then transmitted afterperforming the IFFT operation. Each RS 550 is again transmitted throughthe unmodulated CAZAC sequence.

An example of CAZAC sequences is determined according to

${c_{k}(n)} = {\exp\left\lbrack {\frac{{j2\pi}\; k}{L}\left( {n + {n\frac{n + 1}{2}}} \right)} \right\rbrack}$where L is the length of the CAZAC sequence, n is the index of anelement of the sequence n={0, 1, . . . , L−1}, and k is the index of thesequence. If L is a prime integer, there are L−1 distinct sequenceswhich are defined as k ranges in {0, 1, . . . , L−1}. If a PRB includesan even number of REs, such as, for example, N_(sc) ^(RB)=12, CAZACsequences with an even length can be directly generated through acomputer search for sequences satisfying the CAZAC properties.

FIG. 6 shows a transmitter structure for a CAZAC sequence. Thefrequency-domain version of a computer generated CAZAC sequence 610 isdescribed, as an example. The REs of the assigned PUCCH PRB are selectedat block 620 for mapping, at block 630, the CAZAC sequence An IFFT isperformed at block 640, and a Cyclic Shift (CS) is applied to the outputat block 650. Finally, a CP and filtering are applied at blocks 660 and670, respectively, before transmitting the signal at block 680. Zeropadding is inserted by the reference UE in REs used for the signaltransmission by other UEs and in guard REs (not shown). Moreover, forclarity and conciseness, additional transmitter circuitry such asdigital-to-analog converter, analog filters, amplifiers, and transmitterantennas as they are known in the art, are not shown.

Reverse (complementary) transmitter operations of the operationsillustrated in FIG. 6 are performed for the reception of the CAZACsequence, as illustrated in FIG. 7. Referring to FIG. 7, an antennareceives an RF analog signal at block 710. After processing byprocessing units such as filters, amplifiers, frequency down-converters,and analog-to-digital converters (not shown), the received digital isfiltered at block 720 and the CP is removed at block 730. Subsequently,the CS is restored at block 740, a Fast Fourier Transform (FFT) isapplied at block 750, and the transmitted REs are selected at block 765based on information from the SA or from higher layer signaling. FIG. 7also shows the subsequent correlation 770 with the replica 780 of theCAZAC sequence in order to obtain an estimate of the channel medium(possibly modulated by HARQ-ACK information or CQI information as shownin FIG. 4 or FIG. 5, respectively). Finally, the output 790 is obtained,which can then be passed to a channel estimation unit, such as atime-frequency interpolator, in case of a RS, or can to detect thetransmitted information, in case the CAZAC sequence is modulated byHARQ-ACK information or CQI.

When UCI and data transmission occur in the same sub-frame, UCI may betransmitted together with data in the PUSCH or separately from data inthe PUCCH. Including UCI in the PUSCH avoids simultaneous PUSCH andPUCCH transmissions, thereby conserving transmission power and avoidingan increase in the Peak-to-Average Power Ratio (PAPR) or the CubicMetric (CM) of the combined signal transmission. Conversely, separatelytransmitting UCI in the PUCCH preserves PUSCH REs for data transmissionand utilizes pre-allocated PUCCH resources. The required transmissionpower can be one of the conditions used to decide whether tosimultaneously transmit PUCCH and PUSCH, to transmit UCI with data inthe PUSCH, or to even transmit only UCI in the PUCCH and suspend thePUSCH transmission.

Transmission Power Control (TPC) adjusts the PUSCH or PUCCH transmissionpower to achieve a desired target for the received Signal toInterference and Noise Ratio (SINR) at the Node B, while reducing theinterference to neighboring cells and controlling the rise ofInterference over Thermal (IoT) noise, thereby ensuring the respectivereception reliability targets. Open-Loop (OL) TPC with cell-specific andUE-specific parameters is considered with the capability for the Node Bto also provide Closed Loop (CL) corrections through TPC commands. TheTPC commands are included either in the SA configuring a dynamic PDSCHreception (TPC command adjusts the subsequent HARQ-ACK signaltransmission power) or PUSCH transmission (TPC command adjusts the PUSCHtransmission power), or are provided through a channel in the PDCCHcarrying TPC commands (TPC channel) for PUSCH or PUCCH transmissionsconfigured to occur periodically.

A TPC operation is described as follows based on the TPC operation usedin 3^(rd) Generation Partnership Project (3GPP) Evolved-UniversalTerrestrial Radio Access (E-UTRA) Long Term Evolution (LTE). The PUSCHtransmission power from a UE in reference sub-frame i is set accordingto Equation (1):P _(PUSCH)(i)=min{P _(MAX),10·log₁₀ M _(PUSCH)(i)+P ₀ _(_) _(PUSCH)+α·PL+Δ _(TF)(i)+f(i)}[dBm]  (1)where

-   -   P_(MAX) is the maximum allowed power configured by RRC and can        depend on the UE power amplifier class.    -   M_(PUSCH), (i) is the number of (contiguous) PRBs for PUSCH        transmission.    -   P₀ _(_) _(PUSCH) controls the mean received SINR at the Node B        and is the sum of a cell-specific component P_(O) _(_)        _(NOMINAL) _(_) _(PUSCH) and a UE-specific component P_(O) _(_)        _(UE) _(_) _(PUSCH) provided by RRC.    -   PL is the DL path-loss estimate from the serving Node B as        calculated in the UE.    -   a is a cell-specific parameter provided by RRC with 0≦α≦1.        Fractional TPC is obtained for α<1 as the path-loss is not fully        compensated. For α=0, pure CL TPC is provided.    -   Δ_(TF)(i)=10·log₁₀(2^(K) ^(a) ^(·TBS(i)/N) ^(RE) ^((i))−1) where        K>0 is a UE-specific parameter provided by RRC, TBS(i) is the TB        size, and N_(RE)(i)=M_(PUSCH)(i)·N_(sc) ^(RB)·N_(symb)        ^(PUSCH)(i). Therefore, TBS(i)/N_(RE)(i) defines the number of        coded information bits per RE (Spectral Efficiency (SE)). If        K_(s)>1, such as K_(s)=1.25, Δ_(TF)(i) enables TPC based on the        SE of the PUSCH transmission. TPC based on the SE of the PUSCH        transmission is useful when the adaptation of the PUSCH        Modulation and Coding Scheme (MCS) is slow and tracks only the        path-loss. With MCS adaptation per PUSCH transmission, PUSCH        power variations depending on SE should be avoided and this is        achieved by setting K_(s)=0.    -   f(i)=f(i−1)+δ_(PUSCH)(i) is the function accumulating the CL TPC        command δ_(PUSCH)(i) included in the SA configuring the PUSCH        transmission in sub-frame i, or in a TPC channel in the PDCCH,        with f(0) being the first value after reset of accumulation.

The PUCCH transmission power P_(PUCCH), from a UE in reference sub-framei is set according to Equation (2):P _(PUCCH)(i)=min{P _(MAX) ,P ₀ _(_) _(PUCCH) +PL+h(•)+Δ_(F) _(_)_(PUCCH) +g(i)}[dBm]  (2)where

-   -   P₀ _(_) _(PUCCH) controls the mean received SINR at the Node B        and is the sum of a cell-specific component P_(O) _(_)        _(NOMINAL) _(_) _(PUCCH) and a UE-specific component P_(o)        provided by RRC.    -   h(•) is a function with values depending on whether HARQ-ACK,        SR, or CQI is transmitted.    -   Δ_(F) _(_) _(PUCCH) is provided by RRC and its value depends on        the transmitted UCI type.    -   g(i)=g(i−1)+δ_(PUCCH)(i) is the function accumulating the CL TPC        command δ_(PUCCH)(i) in the PDCCH TPC channel or in the SA        configuring the PDSCH reception and g(0) is the value after        reset of accumulation.

For the SRS, in order to avoid large power variations within sub-framesymbols when the UE transmits PUSCH and SRS in the same sub-frame i, thetransmission power P_(SRS) follows the PUSCH transmission power and isset according to Equation (3):P _(SRS)(i)min{P _(MAX) ,P _(SRS) _(_) _(OFFSET)+10·log₁₀ M _(SRS) +P ₀_(_) _(PUSCH) +α·PL+f(i)}[dBm]  (3)where

-   -   P_(SRS) _(_) _(OFFSET) is a UE-specific parameter        semi-statically configured by RRC    -   M_(SRS) is the SRS transmission BW expressed in number of PRBs.

In order to support data rates higher than data rates possible in legacycommunication systems and further improve the spectral efficiency, BWslarger than BWs of a Component Carrier (CC) for legacy systems areneeded. These larger BWs can be achieved through the aggregation ofmultiple legacy CCs. For example, a BW of 60 MHz is achieved byaggregating three 20 MHz CCs. A UE may perform multiple PUSCHtransmissions during the same sub-frame in the respective UL CCs. FIG. 8illustrates aggregation of multiple legacy CCs, where a UE has threePUSCH transmissions, PUSCH 1 810, PUSCH 2 820 and PUSCH 3 830, in partsof the BW of three respective UL CCs, UC CC1 840, UC CC2 850, and UL CC3860, during the same sub-frame.

The TPC operation should therefore be extended to PUSCH transmissionsfrom a UE in multiple UL CCs during the same sub-frame. Additionally, asPUSCH and PUCCH transmissions from a UE in the same sub-frame and in thesame or different UL CCs are also supported, the TPC operation shouldalso include the combined operation for the PUSCH TPC and the PUCCH TPC.As a UE may also have multiple PUCCH transmissions in the same sub-frameand in the same or different UL CCs, the PUCCH TPC operation should alsoinclude support for multiple PUCCH transmissions. As a UE may havemultiple transmitter antennas, the TPC operation should support thesignal transmission from multiple antennas.

Therefore, there is a need to define the PUSCH TPC operation formultiple PUSCH transmissions from a UE in the same sub-frame in the sameUL CC and in multiple UL CCs. There is also a need to define the PUCCHTPC operation for multiple PUCCH transmissions, of the same or differentUCI signals, from a UE in the same sub-frame in the same UL CC and inmultiple UL CCs. There is also a need to define the TPC operation formultiple UE transmitter antennas. There is also a need to define thecombined PUSCH and PUCCH TPC operation for multiple PUSCH transmissionsand PUCCH transmissions from a UE in the same sub-frame in the same ULCC and in multiple UL CCs.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been designed to solve at leastthe aforementioned limitations in the prior art. The present inventionalso provides methods and apparatuses for the TPC application tosimultaneous PUSCH transmissions in multiple CCs, to simultaneoustransmissions of different UCI types, to simultaneous PUSCH and PUCCHtransmissions, and to signal transmissions from multiple UE transmitterantennas having respectively multiple power amplifiers.

In accordance with an aspect of the present invention, there is provideda method for wireless communication by a user equipment (UE), includingdetermining a first power for transmitting first control information ona physical uplink control channel (PUCCH), determining a second powerfor transmitting both first data and second control information on afirst physical uplink shared channel (PUSCH), determining a third powerfor transmitting second data on a second PUSCH, reducing the third powerif a sum of the first power, the second power and the third powerexceeds a predetermined value, and transmitting at least one of thefirst control information on the PUCCH using the first power, the firstdata and the second control information on the first PUSCH using thesecond power, and the second data on the second PUSCH using the reducedthird power.

In accordance with another aspect of the present invention, there isprovided an apparatus for wireless communication in a UE, including acontroller adapted to determine a first power for transmitting firstcontrol information on a PUCCH, to determine a second power fortransmitting both first data and second control information on a firstPUSCH, to determine a third power for second data on a second PUSCH, andto reduce the third power if a sum of the first power, the second power,and the third power exceeds a predetermined value, and a transmitteradapted to transmit at least one of the first control information on thePUCCH using the first power, the first data and the second controlinformation on the first PUSCH using the second power, and the seconddata on the second PUSCH using the reduced third power.

In accordance with another aspect of the present invention, there isprovided a method for wireless communication by a base station,including configuring a UE with a PUCCH conveying first controlinformation, a first PUSCH conveying both first data and second controlinformation, and a second PUSCH conveying second data, transmittingparameters required for transmission power control of the PUCCH and thefirst and second PUSCHs, and receiving, from the UE, at least one of thefirst control information on the PUCCH, the first data and the secondcontrol information on the first PUSCH, and the second data on thesecond PUSCH, wherein if a sum of a first power determined fortransmitting the PUCCH by the UE, a second power determined fortransmitting the first PUSCH by the UE, and a third power determined fortransmitting the second PUSCH by the UE exceeds a predetermined value,the third power is reduced, and wherein the PUCCH is transmitted withthe first power, the first PUSCH is transmitted with the second power,and the second PUSCH is transmitted with the reduced third power.

In accordance with another aspect of the present invention, there isprovided an apparatus for wireless communication in a base station,including a controller adapted to configure a UE with a PUCCH conveyingfirst control information, a first physical uplink shared channel(PUSCH) conveying both first data and second control information, and asecond PUSCH conveying second data, a transmitter adapted to transmitparameters required for transmission power control of the PUCCH and thefirst and second PUSCHs, and a receiver adapted to receive, from the UE,at least one of the first control information on the PUCCH, the firstdata and the second control information on the first PUSCH, and thesecond data on the second PUSCH, wherein if a sum of a first powerdetermined for transmitting the PUCCH by the UE, a second powerdetermined for transmitting the first PUSCH by the UE and a third powerdetermined for transmitting the second PUSCH by the UE exceeds apredetermined value, the third power is reduced, and wherein the PUCCHis transmitted with the first power, the first PUSCH is transmitted withthe second power and the second PUSCH is transmitted with the reducedthird power.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of the presentinvention will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIG. 1 is a diagram illustrating a UL sub-frame structure for PUSCHtransmissions in the UL of the communication system;

FIG. 2 is a block diagram illustrating a DFT-S-OFDM transmitter;

FIG. 3 is a block diagram illustrating a DFT-S-OFDM receiver;

FIG. 4 is a block diagram illustrating a slot structure for HARQ-ACKsignal transmission in the PUCCH;

FIG. 5 is a block diagram illustrating a slot structure CQI signaltransmission in the PUCCH;

FIG. 6 is a block diagram illustrating a transmitter structure for aCAZAC-based sequence;

FIG. 7 is a block diagram illustrating a receiver structure for aCAZAC-based sequence;

FIG. 8 is a block diagram illustrating UL carrier aggregation;

FIG. 9 is a flow diagram illustrating a first method for powerallocation to PUSCH transmissions in multiple UL CCs under a limit forthe total maximum transmission power according to an embodiment of thepresent invention;

FIG. 10 is a flow diagram illustrating a second method for powerallocation to PUSCH transmissions in multiple UL CCs under a limit forthe total maximum transmission power according to an embodiment of thepresent invention;

FIG. 11 is a flow diagram illustrating a method for power allocation tosimultaneous PUSCH and PUCCH transmissions or to PUSCH transmissionsdepending on whether the transmissions include UCI under a limit for thetotal maximum transmission power according to an embodiment of thepresent invention;

FIG. 12 is a flow diagram illustrating the power allocation to differentUCI types under a limit for the total maximum transmission poweraccording to an embodiment of the present invention;

FIG. 13 is a block diagram illustrating an application of transmissionpower control for multiple UE transmitter antennas with respectivemultiple power amplifiers according to an embodiment of the presentinvention; and

FIG. 14 is a block diagram illustrating an application of differentclosed loop transmission power control commands for each UE transmitterantenna having its own power amplifier.

DETAILED DESCRIPTION OF EMBODIMENTS

Hereinafter, various embodiments of the present invention will bedescribed with reference to the accompanying drawings. A detaileddescription of known functions and configurations incorporated hereinwill be omitted when it may obscure the subject matter of the presentinvention.

Although the present invention is described in relation to an OrthogonalFrequency Division Multiple Access (OFDMA) communication system, thepresent invention may also be applied to all Frequency DivisionMultiplexing (FDM) systems generally, including Single-Carrier FrequencyDivision Multiple Access (SC-FDMA), OFDM, FDMA, Discrete FourierTransform (DFT)-spread OFDM, DFT-spread OFDMA, SC-OFDMA, and SC-OFDM.

A first aspect of the invention considers a PUSCH TPC operation formultiple PUSCH transmissions from a UE in a sub-frame in the same UL CCand in multiple UL CCs. According to an embodiment of the presentinvention, the TPC formula for the PUSCH transmission power in a singleCC and over contiguous PRBs also applies, per UL CC, for PUSCHtransmission in multiple UL CCs and over contiguous or non-contiguousPRBs. Then, the PUSCH transmission power P_(PUSCH)(i,k) from a UE insub-frame i and UL CC k, k=1, . . . , K, is set as

$\begin{matrix}{{{P_{PUSCH}\left( {i,k} \right)} = {\min{\left\{ {P_{MAX},{{{10 \cdot \log_{10}}{M_{PUSCH}\left( {i,k} \right)}} + {P_{0{\_{PUSCH}}}(k)} + {{\alpha(k)} \cdot {{PL}(k)}} + {\Delta_{TF}\left( {i,k} \right)} + {f\left( {i,k} \right)}}} \right\}\mspace{14mu}\lbrack{dBm}\rbrack}}}\mspace{20mu}{{{subject}\mspace{14mu}{to}\mspace{14mu}{\sum\limits_{k = 1}^{K}\;{P_{PUSCH}\left( {i,k} \right)}}} \leq P_{MAX}}} & (4)\end{matrix}$where

-   -   M_(PUSCH) (i,k) is the number of, contiguous or non-contiguous,        PRBs for PUSCH transmission in UL CC k.    -   P₀ _(_) _(PUSCH) (k) controls the mean received SINR at the Node        B and is the sum of a cell-specific component P_(O) _(_)        _(NOMINAL) _(_) _(PUSCH) and a UE-specific component P_(O) _(_)        _(UE) _(_) _(PUSCH) (k) which are provided to the UE by RRC.    -   α(k) is a cell-specific parameter provided by RRC for UL CC k        with 0≦α(k)≦1.    -   PL(k) is the DL path-loss estimate from the serving Node B as        calculated at the UE and applied to UL CC k.    -   Δ_(TF)(i,k)=10·log₁₀(2^(K) ^(s) ^((k)·TBS(i,k)/N) ^(RE)        ^((i,k))−1) where K_(s)(k) is a parameter provided by RRC in UL        CC k, TBS(i,k) is the TB size, and        N_(RE)(i,k)=M_(PUSCH)(i,k)·N_(sc) ^(RB)·N_(symb) ^(PUSCH)(i,k).    -   f(i,k)=f(i−1,k)+δ_(PUSCH)(i,k) is the function accumulating the        CL TPC command δ_(PUSCH)(i,k) during sub-frame i with f(0, k)        being the first value after reset of accumulation. If the PUSCH        transmission in UL CC k is configured through a SA, the CL TPC        command δ_(PUSCH)(i,k) is included in that SA. Otherwise, a TPC        channel in the PDCCH informs the UE of the CL TPC command        δ_(PUSCH)(i,k).

While the TPC formula in Equation (4) is a generalization of the TPCformula for PUSCH transmission in a single UL CC in Equation (1),Equation (4) raises several issues including:

-   -   a) whether to define UL CC specific parameters,    -   b) how the UE performs UL CC specific DL path-loss measurements        and accumulation of CL TPC commands, and    -   c) how to allocate the power for PUSCH transmissions in multiple        UL CCs in case P_(MAX) is reached before the PUSCH transmission        in each UL CC is allocated its target power.

Regarding the definition of UL CC specific parameters, direct extensionof all parameters to CC-specific values or the following restrictionsmay be considered:

-   -   P₀ _(_) _(PUSCH)(k): The cell-specific component P_(O) _(_)        _(NOMINAL) _(_) _(PUSCH) (k) may be common to all UL CCs while        the UE-specific component P_(o) (k) may be different for each UL        CC.    -   α(k) is a cell-specific parameter provided by RRC for each UL CC        k.    -   K_(s)(k) in Δ_(TF)(i,k) may be common to all UL CCs a UE is        configured since either adaptive MCS selection applies to all UL        CCs (K_(s)=0) or to none of them (for example, K_(s)=1.25).

Regarding the UL CC specific DL path-loss measurements and accumulationof the CL TPC commands at the UE, the following restrictions may beconsidered:

-   -   PL(k): Path-loss measurements on each UL CC are not needed for        BW contiguous UL CCs but are needed for BW non-contiguous UL        CCs. Since it is desirable for the UE functionality to not        differentiate between the cases of BW contiguous and BW        non-contiguous UL CCs, path-loss measurements on multiple UL CCs        are supported. Moreover, each UE can be configured an UL CC        which is linked to a DL CC where the UE performs the path-loss        measurement. The UE uses that UL CC to report the path-loss        measurement. The Node B informs each UE through RRC whether        additional path-loss measurements need to be performed for the        remaining UL CCs a UE is configured, which are linked to        respective DL CCs. The Node B may also inform the UEs of the        path-loss measurement reporting rate.    -   f(i,k): Accumulation of CL TPC commands each UL CC k is always        performed in the same manner as PUSCH transmission in a single        UL CC. However, in case of PUSCH transmissions in multiple UL        CCs or in case of concurrent PUCCH transmissions, P_(MAX) may be        reached before each channel is allocated its nominal        transmission power. Then, as it is subsequently discussed, the        transmission power of the various channels is reduced. This        reduction may lead to the suspension of PUSCH transmission in an        UL CC. In such case, CL TPC commands are always accumulated in        each respective UL CC even when a respective PUSCH transmission        is suspended.

Regarding the PUSCH transmission power allocation among multiple UL CCswhen P_(MAX) is reached before the PUSCH transmission in each UL CC isallocated its nominal power according Equation (4), one option is toreduce the PUSCH transmission power in each UL CC by the same amount sothat the total transmission power does not exceed P_(MAX). However, thisreduction option effectively penalizes PUSCH transmissions of higherSpectral Efficiency (SE) more than this reduction option penalizes PUSCHtransmissions with lower SE, and therefore, this option is detrimental.Additionally, this reduction option may lead to the suspension of PUSCHtransmissions having a low nominal power.

Embodiments according to the present invention consider that the sameamount of power reduction is applied only to PUSCH transmissions innon-contiguous BWs in the same UL CC, which are assumed to have the sameSE (or MCS). PUSCH transmissions in different UL CCs are allowed to havedifferent SEs (or MCSs) and two approaches are subsequently describedherein for adjusting the transmission power when the total UEtransmission power exceeds P_(MAX). The same principle applies in eachof the two approaches. For some PUSCH transmissions, it is possible toavoid any power reduction while, for the remaining PUSCH transmissions,the adjusted power is proportional to the SINR or to the nominaltransmission power.

The first approach considers that the amount of allocated power isproportional to the SINR of the PUSCH transmission. The SE in UL CC kcan be expressed as the ratio TBS(i,k)/N_(RE)(i,k) providing the numberof coded information bits per RE. Then, the Shannon capacity formula isapplied according to Equation (5),

$\begin{matrix}{{{SE}\left( {i,k} \right)} = {\frac{{TBS}\left( {i,k} \right)}{N_{RE}\left( {i,k} \right)} = {{{\log_{2}\left( {1 + {{SINR}\left( {i,k} \right)}} \right)}/f} = {{\log_{2}\left( {1 + \frac{P_{PUSCH}\left( {i,k} \right)}{\left( {I + N} \right)\left( {i,k} \right)}} \right)}/f}}}} & (5)\end{matrix}$where f is a normalizing factor such as K_(s), and (I+N)(i,k) is the sumof interference and noise power in UL CC k. Therefore,

${{{SINR}\left( {i,k} \right)} = {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f} - {1\mspace{14mu}{or}}}},$by approximation,

${{SINR}\left( {i,k} \right)} \approx 2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}$as the SINR for UEs scheduled PUSCH transmissions in multiple UL CCs istypically sufficiently larger than 1 (in the linear domain). When thenominal PUSCH transmission power according to Equation (4) cannot beallocated in any respective UL CC, in order to obtain a proportionalreduction to the SINR, the PUSCH transmission power in UL CC k isderived according to Equation (6):

$\begin{matrix}{{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {{\min\left( {{P_{PUSCH}\left( {i,k} \right)},{P_{MAX} \cdot \left( {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}/{\sum\limits_{k = 1}^{K}2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}}} \right)}} \right)}.}} & (6)\end{matrix}$

A procedure for allocating the power to PUSCH transmissions in multipleUL CCs, when the total nominal transmission power exceeds P_(MAX),includes the following steps:

-   -   a) Determine the UL CCs, if any, for which

$\begin{matrix}{{P_{PUSCH}\left( {i,k} \right)} < {P_{MAX} \cdot \left( {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}/{\sum\limits_{k = 1}^{K}2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}}} \right)}} & (7)\end{matrix}$and create a set J with the respective indexes, J={1, . . . , J₀}. Inthese UL CCs, the PUSCH transmission power remains unchanged and is asdescribed in Equation (4).

-   -   b) For the remaining UL CCs, k∈{1, . . . , K}, k∉J, the PUSCH        transmission power is determined according to Equation (8):

$\begin{matrix}{{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {{\min\left( {{P_{PUSCH}\left( {i,k} \right)},{\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{0}}{P_{PUSCH}\left( {i,j} \right)}}} \right) \cdot \left( {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}/{\sum\limits_{\underset{k \notin j}{k = 1}}^{K}2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}}} \right)}} \right)}.}} & (8)\end{matrix}$

The preceding procedure ensures, that in an UL CC where the nominalPUSCH transmission power is lower than the respective transmission powerin Equation (6), the nominal PUSCH transmission power is appliedaccording Equation (4) and the sum of nominal PUSCH transmission powersis subtracted from P_(MAX) prior to adjusting the power of PUSCHtransmissions in the remaining UL CCs.

Moreover, the above procedure may be implemented in an iterativefashion, wherein the second step b) is further divided into 2 sub-steps,where in the first sub-step the UL CCs for which P_(PUSCH)^(adjust)(i,k)=P_(PUSCH)(i,k) are identified, if any, another set J¹={1,. . . , J₀ ¹} with the respective indexes is created. In the secondsub-step, Equation (8) is further refined as Equation (9):

$\begin{matrix}{{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {{\min\left( {{P_{PUSCH}\left( {i,k} \right)},{\left( {{P_{MAX} - {\sum\limits_{j = 1}^{J_{0}}{P_{PUSCH}\left( {i,j} \right)}}} = {\sum\limits_{j_{1} = 1}^{J_{0}^{1}}{P_{PUSCH}\left( {i,j_{1}} \right)}}} \right) \cdot \left( {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}/{\sum\limits_{\underset{{k \notin J},J^{1}}{k = 1}}^{K}2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}}} \right)}} \right)}.}} & (9)\end{matrix}$The procedure can continue from the second sub-step in the sameiterative manner with two more sub-sub-steps. However, the mechanisms ofthe first approach are evident from the preceding description andfurther details are omitted for clarity and conciseness.

An application for the first approach is described as follows. Areference UE is assumed to have P_(MAX)=10, PUSCH transmissions in K=3CCs in sub-frame i, and nominal transmission powers P_(PUSCH)(i,1)=2,P_(PUSCH)(i,2)=3, and P_(PUSCH)(i,3)=7. The values for

$2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f},{k = 1},2,{{3\mspace{14mu}{are}\mspace{14mu} 2^{\frac{{TBS}{({i,1})}}{N_{RE}{({i,1})}} \cdot f}} = 5},{2^{\frac{{TBS}{({i,2})}}{N_{RE}{({i,2})}} \cdot f} = 2},{and}$$2^{\frac{{TBS}{({i,3})}}{N_{RE}{({i,3})}} \cdot f} = 3.$Since

${{\sum\limits_{k = 1}^{3}{P_{PUSCH}\left( {i,k} \right)}} = {{12 > 10} = P_{MAX}}},$the

UE applies the previous procedure for the PUSCH transmission powerallocation in each CC. From the first step a), the condition in Equation(7) applies only when k=1 and the nominal PUSCH transmission powerP_(PUSCH)(i,1)=2 is assigned. Therefore, the set J contains k=1. Fromthe second step b), based on Equation (8), the PUSCH transmission powerassigned for k=2,3 is respectively P_(PUSCH) ^(adjust)(i,2)=3=P_(PUSCH)^(adjust)(i,2) and P_(PUSCH) ^(adjust)(i,3)=24/5=4.8. The totalallocated power is 9.8, which is less than P_(MAX)=10. The totalallocated power is less than P_(MAX), because the nominal PUSCHtransmission power P_(PUSCH) ^(adjust)(i,2)=P_(PUSCH)(i,2)=3 isallocated instead of

${{\left( {P_{MAX} - {P_{PUSCH}\left( {i,1} \right)}} \right) \cdot \left( {2^{\frac{{TBS}{({i,2})}}{\;^{N_{RE}{({i,2})}}} \cdot f}/{\sum\limits_{k = 2}^{3}2^{\frac{{TBS}{({i,2})}}{N_{RE}{({i,2})}} \cdot f}}} \right)} = {{16/5} = 3.2}},$which would have made the total allocated power equal to P_(MAX). AsP_(PUSCH) ^(adjust)(i,3)<P_(PUSCH)(i,3) andP_(PUSCH)(i,1)+P_(PUSCH)(i,2)+P_(PUSCH) ^(adjust)(i,3)<P_(MAX), it wouldbe desirable to further increase P_(PUSCH) ^(adjust)=(i,3). This furtherincrease is achieved by the iterative part of the procedure where theset J¹ contains k=2. Then, Equation (9) provides P_(PUSCH)^(adjust)(i,3)=5 (instead of P_(PUSCH) ^(adjust)(i,3)=4.8 if noiterations were applied). Nevertheless, as previously mentioned, if asimplified PUSCH power allocation process is desired, the iterativesteps of the procedure may be omitted.

A PUSCH power allocation using the first approach according to anembodiment of the present invention is illustrated in FIG. 9. Referringto FIG. 9, the UE first determines the nominal PUSCH transmission powerP_(PUSCH) (i,k) in each of the UL CCs where the UE has PUSCHtransmission in step 910. Subsequently, the UE determines whether theaggregate of the nominal PUSCH transmission powers is less than P_(MAX)in step 920. If the aggregate is less than P_(MAX) is, the PUSCHtransmission in an UL CC uses the respective nominal transmission powerin step 930. If the aggregate of the nominal PUSCH transmission powersis at least equal to P_(MAX), the UE determines the PUSCH transmissionswith

${{P_{PUSCH}\left( {i,k} \right)} < {P_{MAX} \cdot \left( {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}/{\sum\limits_{k = 1}^{K}2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}}} \right)}},$creates a set J with the respective UL CC indexes, and transmits PUSCHin those UL CCs using the nominal transmission power in step 940.Finally, the UE subtracts the aggregate power of the PUSCH transmissionscorresponding to step 940 from P_(MAX) and computes the PUSCHtransmission power in the remaining UL CCs according to

${{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {\min\left( {{P_{PUSCH}\left( {i,k} \right)},{\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{0}}{P_{PUSCH}\left( {i,j} \right)}}} \right) \cdot \left( {2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}/{\sum\limits_{\underset{k \notin J}{k = 1}}^{K}2^{\frac{{TBS}{({i,k})}}{N_{RE}{({i,k})}} \cdot f}}} \right)}} \right)}},$in step 950. The description can be extended in a straightforward mannerto include the iterative step but a detailed description thereof isomitted for clarity and conciseness.

The second approach provides implementation simplicity and similarcharacteristics as the first approach in the linear range of the Shannoncapacity curve and considers that the PUSCH transmission power isproportionally reduced relative to a nominal value according to Equation(10)

$\begin{matrix}{{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {P_{MAX} \cdot \left( {{P_{PUSCH}\left( {i,k} \right)}/{\sum\limits_{k = 1}^{K}{P_{PUSCH}\left( {i,k} \right)}}} \right)}} & (10)\end{matrix}$

The procedure to allocate the power to PUSCH transmissions in multipleUL CCs in case the total nominal transmission power exceeds considersthe following steps:

-   c) Determine the UL CCs, if any, for which

$\begin{matrix}{{P_{PUSCH}\left( {i,k} \right)} < {P_{MAX} \cdot \left( {{P_{PUSCH}\left( {i,k} \right)}/{\sum\limits_{k = 1}^{K}{P_{PUSCH}\left( {i,k} \right)}}} \right)}} & (11)\end{matrix}$

-   -   and create a set J with the respective indexes, J={1, . . . ,        J₀}. In these UL CCs, the nominal PUSCH transmission power is        applied as described in Equation (4).

-   d) For the remaining UL CCs k E {1, . . . , K}, k∉J, the PUSCH    transmission power is determined according to Equation (12):

$\begin{matrix}{{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {\min\left( {{P_{PUSCH}\left( {i,k} \right)},{\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{0}}{P_{PUSCH}\left( {i,j} \right)}}} \right) \cdot \left( {{P_{PUSCH}\left( {i,k} \right)}/{\sum\limits_{\underset{k \notin J}{k = 1}}^{K}{P_{PUSCH}\left( {i,k} \right)}}} \right)}} \right)}} & (12)\end{matrix}$

Similar to the first approach, the preceding procedure ensures that inUL CCs where the nominal PUSCH transmission power is less than therespective one in Equation (10), the nominal PUSCH transmission power isapplied according to Equation (4) and the sum of nominal PUSCHtransmission powers is subtracted from P_(MAX) before adjusting eachPUSCH transmission power in the remaining UL CCs. Moreover, thepreceding procedure may be implemented in an iterative fashion, whereinthe second step d) is further divided into 2 sub-steps, wherein in thefirst sub-step of step d), the UL CCs for which P_(PUSCH)^(adjust)(i,k)=P_(PUSCH)(i,k) are identified, if any, another set J¹={1,. . . , J₀ ¹} with the respective indexes is created, and in the secondsub-step of step d) Equation (12) is further refined as Equation (13):

$\begin{matrix}{{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {\min\left( {{P_{PUSCH}\left( {i,k} \right)},{\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{0}}{P_{PUSCH}\left( {i,j} \right)}} - {\sum\limits_{j_{1} = 1}^{J_{0}^{1}}{P_{PUSCH}\left( {i,j_{1}} \right)}}} \right) \cdot \left( {{P_{PUSCH}\left( {i,k} \right)}/{\sum\limits_{\substack{k = 1 \\ k \notin {J \cdot J^{1}}}}^{K}{P_{PUSCH}\left( {i,k} \right)}}} \right)}} \right)}} & (13)\end{matrix}$and continue from the second sub-step in the same iterative manner withtwo additional sub-sub-steps. Nevertheless, for the first approach, themechanisms of the second approach are evident from the describedprocedure and further details are omitted for brevity. Additionally, forboth the first approach and the second approach, the first step of thepower allocation may be avoided in order to simplify the respectiveprocedure (equivalent to the case that the set J is empty).

A PUSCH power allocation using the second approach according to anembodiment of the present invention is illustrated in FIG. 10. Referringto FIG. 10, the UE first determines the nominal PUSCH transmission powerP_(PUSCH)(i,k) in each respective UL CC in step 1010. Subsequently, theUE determines whether the aggregate of the nominal PUSCH transmissionpowers is less than P_(MAX), in step 1020. If the aggregate is less thanP_(MAX), the UE transmits its PUSCH in the respective UL CC using therespective nominal transmission power in step 1030. If the aggregate ofthe nominal PUSCH transmission powers is at least equal to P_(MAX), theUE determines the PUSCH transmissions such that

${{P_{PUSCH}\left( {i,k} \right)} < {P_{MAX} \cdot \left( {{P_{PUSCH}\left( {i,k} \right)}/{\sum\limits_{k = 1}^{K}{P_{PUSCH}\left( {i,k} \right)}}} \right)}},$creates a set J with the respective UL CCs indexes, and transmits PUSCHin those UL CCs using the nominal transmission power in step 1040.Finally, the UE subtracts the aggregate power of the PUSCH transmissionsof step 1040 from P_(MAX) and computes the PUSCH transmission power inthe remaining UL CCs as

${{P_{PUSCH}^{adjust}\left( {i,k} \right)} = {\min\left( {{P_{PUSCH}\left( {i,k} \right)},{\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{0}}{P_{PUSCH}\left( {i,j} \right)}}} \right) \cdot \left( {{P_{PUSCH}\left( {i,k} \right)}/{\sum\limits_{\substack{k = 1 \\ k \notin J}}^{K}{P_{PUSCH}\left( {i,k} \right)}}} \right)}} \right)}},$in step 1050. Similar to the first approach, the second approach canalso be extended in a straightforward manner to include the iterativestep. However, a detailed description thereof is omitted for clarity andconciseness. Moreover, detailed description of the iterative stepregarding the first approach can be used to show the applicability ofthe procedure in an iterative fashion according to the second approach.

A method according to an embodiment of the present invention alsoconsider that instead of SINRs or nominal transmission powers, the SEs(or the MCSs) can be used as metrics for determining PUSCH transmissionpower adjustments. Using the SEs of the PUSCH transmissions in UL CCsk∈{1, . . . , K} during sub-frame i as metrics, the PUSCH transmissionpower in UL CC k can be determined as

${P_{PUSCH}^{adjust}\left( {i,k} \right)} = {P_{MAX} \cdot {\left( {{{SE}\left( {i,k} \right)}/{\sum\limits_{k = 1}^{K}{{SE}\left( {i,k} \right)}}} \right).}}$Using the MCSs of the PUSCH transmissions in UL CCs k∈{1, . . . , K}during sub-frame i as metrics, the PUSCH transmission power in UL CC kcan be determined as

${P_{PUSCH}^{adjust}\left( {i,k} \right)} = {P_{MAX} \cdot {\left( {{{MCS}\left( {i,k} \right)}/{\sum\limits_{k = 1}^{K}{{MCS}\left( {i,k} \right)}}} \right).}}$

The two previously described approaches for the PUSCH power allocationwhen P_(MAX) is reached assume that none of the PUSCH transmissionscontains UCI and that the UE does not have any PUCCH transmissions. Whenneither of these assumptions holds, a method according to an embodimentof the present invention considers the following modifications to thePUSCH transmission power allocation:

-   -   e) The nominal power is used for any PUSCH transmission        containing UCI and it is included in the set J. The procedure to        determine the power of the remaining PUSCH transmissions remains        as previously described. If multiple PUSCH transmissions from a        UE contain UCI and their combined transmission power exceeds        P_(MAX), PUSCH transmissions with HARQ-ACK are prioritized over        ones with other UCI types as it is subsequently described.    -   f) If the UE also has PUCCH transmissions in the same sub-frame,        the nominal power of the PUCCH transmissions is used and        included in the set J. The procedure to determine the power of        the remaining PUSCH transmissions is the same as the previously        described procedure.

Modifications to the PUSCH transmission power allocation according to anembodiment of the present invention are illustrated in FIG. 11.Referring to FIG. 11, the UE first allocates power to its PUCCHtransmissions, if any, over all respective UL CCs including potentialmultiple PUCCH transmissions in the same UL CC, and to its PUSCHtransmissions including UCI, if any. The same UCI is not transmitted inboth the PUCCH and the PUSCH in sub-frame i. The total power allocatedto C PUCCH transmissions is set according to

$P_{PUCCH}^{tot} = {\sum\limits_{c = 1}^{C}{P_{PUCCH}\left( {i,c} \right)}}$and the total power allocated to U PUSCH transmissions with UCI is setaccording to

$P_{PUCCH}^{{tot},U} = {\sum\limits_{u = 1}^{U}{P_{PUSCH}\left( {i,u} \right)}}$in step 1110. Subsequently, the UE subtracts these total allocatedpowers from P_(MAX) and uses P_(MAX) ^(rem)=P_(MAX)−P_(PUCCH)^(tot)−P_(PUSCH) ^(tot,U) instead of P_(MAX) to allocate power in theremaining PUSCH transmissions, if any, in step 1120.

The PUSCH transmissions can be ranked in consideration of the presenceof UCI, and the ranking can also extend in general to the UL CCs of thePUSCH transmission. For example, a UE can be configured by the Node Bthe UL CCs k∈{1, . . . , K} in order of significance, thereby rankingthe UL CCs and having a primary UL CC, a secondary UL CC, etc., or thisranking can be in order of SINR, SE, MCI, or UCI type. For simplicity,the value of k now refers to the ranking of the UL CC for a particularUE, but not to the actual physical ordering of an UL CC with respect tothe other UL CCs. Then, the PUSCH transmission power adjustmentprocedure starts from the L CC with the lowest rank and determines therespective adjustment to the PUSCH transmission power as

${P_{PUSCH}^{adjust}\left( {i,K} \right)} = {P_{MAX} - {\sum\limits_{k = 1}^{K - 1}{{P_{PUSCH}\left( {i,k} \right)}.}}}$If P_(PUSCH) ^(adjust)(i,K) is not negative, the PUSCH power adjustmentprocess terminates and the PUSCH in each remaining UL CC k∈{1, . . . ,K−1} is allocated the respective nominal transmission power. IfP_(PUSCH) ^(adjust)(i,K) is negative, PUSCH transmission in UL CC K issuspended and the PUSCH transmission power adjustment process continuesto UL CC K−1. Then, P_(PUSCH) ^(adjust)(i,K−1) is determined accordingto

${P_{PUSCH}^{adjust}\left( {i,{K - 1}} \right)} = {P_{MAX} - {\sum\limits_{k = 1}^{K - 2}{{P_{PUSCH}\left( {i,k} \right)}.}}}$Similarly, if P_(PUSCH) ^(adjust)(i,K−1) is not negative, the PUSCHtransmission power adjustment process terminates and the PUSCH in eachof the remaining UL CCs k∈{1, . . . , K−2} is allocated the respectivenominal transmission power. If P_(PUSCH) ^(adjust)(i,K−1) is negative,PUSCH transmission in UL CC K−1 is also suspended and the PUSCHtransmission power adjustment process continues to UL CC K−2 in the samemanner. In general, the PUSCH power adjustment process terminates at ULCC k₁>1 with

${P_{PUSCH}^{adjust}\left( {i,k_{1}} \right)} = {{P_{MAX} - {\sum\limits_{k = 1}^{k_{1} - 1}{P_{PUSCH}\left( {i,k} \right)}}} \geq 0}$where k₁ is the largest UL CC index satisfying the previous conditionand, if k₁<K, the PUSCH transmission in UL CCs k∈{k₁+1, . . . , K} issuspended. If k₁=1, the PUSCH transmission occurs only in the primary CCwith P_(PUSCH) ^(adjust)(i,1)=P_(MAX) and it is suspended in all otherUL CCs.

The TPC formula for the PUCCH transmission power from a UE in a singleCC and over contiguous PRBs also applies, per UL CC, for PUCCHtransmission in multiple UL CCs and over contiguous or non-contiguousPRBs. Then, the PUCCH transmission power P_(PUSCH)(i,k) from a UE insub-frame i and UL CC k is set according to Equation (14):

$\begin{matrix}{{P_{PUCCH}\left( {i,k} \right)} = {\min\left\{ {P_{MAX},{{P_{0{\_ PUCCH}}(k)} + {{PL}(k)} + {h( \cdot )} + \Delta_{F\_ PUCCH} + {g\left( {i,k} \right)}}} \right\}\mspace{11mu}{\quad{{\left\lbrack {{dB}\; m} \right\rbrack\mspace{79mu}{subject}\mspace{14mu}{to}\mspace{79mu}{\sum\limits_{k = 1}^{K}{P_{PUCCH}\left( {i,k} \right)}}} \leq P_{MAX}}}}} & (14)\end{matrix}$where

-   -   P₀ _(_) _(PUCCH)(k) controls the mean received SINR at the Node        B and is the sum of a cell-specific component P_(O) _(_)        _(NOMINAL) _(_) _(PUCCH) (k) and a UE-specific component P_(O)        _(_) _(UE) _(_) _(PUCCH)(k) which are provided to the UE by RRC.    -   g(i,k)=g(i−1,k)+δ_(PUCCH)(i,k) is a function accumulating the CL        TPC command δ_(PUCCH)(i,k) in the PDCCH TPC channel or in the SA        configuring the PDSCH reception for UL CC k in sub-frame i.    -   The parameters h(•) and Δ_(F) _(_) _(PUCCH) are the same as for        a single PUCCH transmission in a single UL CC, while PL(k) is        defined for the PUSCH transmission in UL CC k.

While the TPC formula in Equation (10) is a generalization of the TPCformula for a single PUCCH transmission in a single UL CC in Equation(2), the same issues as the issues for PUSCH transmissions in multipleUL CCs are raised including:

-   -   a) whether to define UL CC specific parameters,    -   b) how the UE performs UL CC specific DL path-loss measurements        and accumulation of CL TPC commands, and    -   c) how allocate PUCCH transmission power in multiple UL CCs in        case P_(MAX) is reached before the PUCCH transmission in each UL        CC is allocated its target transmission power.

Regarding the definition of UL CC specific parameters, direct extensionof all parameters to CC-specific values or the following restrictionsmay be considered:

-   -   P₀ _(_) _(PUCCH)(k): The cell-specific component P_(O) _(_)        _(NOMINAL) _(_) _(PUCCH)(k) may be common for all UL CCs while        the UE-specific component P_(O) _(_) _(UE) _(_) _(PUCCH)(k) may        be different for each UL CC.

Regarding the path-loss measurements and the accumulation of CL TPCcommands at the UE, the following may be considered:

-   -   PL(k): The aspects for DL path-loss measurements are the same as        corresponding aspects for the PUSCH TPC operation.    -   g(i,k): Accumulation of CL TPC commands in each UL CC k is        performed in the same manner as for PUCCH transmission in a        single UL CC. However, in case of PUCCH transmissions in        multiple UL CCs, P_(MAX) may be reached before each channel is        allocated its nominal transmission power. As it is later        discussed, this may result to the suspension of a PUCCH        transmission. The invention considers that the CL TPC commands        for a respective PUCCH transmission are always accumulated in        the respective UL CC even when the transmission is suspended.

Regarding the PUCCH transmission power allocation among multiple UCIsignals when P_(MAX) is reached before the nominal PUCCH transmission isallocated in each UCI signal, the invention considers the followingprinciples:

-   -   Transmission power for HARQ-ACK signaling is unaffected and is        allocated first.        -   If there are multiple HARQ-ACK channels and P_(MAX) is            reached, a proportional decrease in the nominal transmission            power is applied as the proportional decrease was previously            described according to the second approach for the PUSCH            transmission power allocation.    -   Transmission power for SR signaling is allocated next. SR        transmission is always used in the resources of a single UL CC        configured to the UE through RRC signaling. If P_(MAX) is        reached before the SR signaling is allocated its nominal        transmission power, two options exist:        -   Drop the SR transmission (by default if the power for            HARQ-ACK signaling is P_(MAX)).        -   Transmit the SR with reduced power.    -   As a false positive SR is less detrimental for the overall        system operation than a missed/dropped SR, the invention        considers the second option. Therefore, the SR transmission        power P_(PUCCH) _(_) _(SR) ^(adjust)(i) in sub-frame i in the        configured UL CC is given by Equation (15)

$\begin{matrix}{{P_{PUCCH\_ SR}^{adjust}(i)} = {\min\left( {{P_{PUCCH\_ SR}(i)},\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{{ACK}/{NAK}}}{P_{{PUCCH\_ HARQ} - {ACK}}\left( {i,j} \right)}}} \right)} \right)}} & (15)\end{matrix}$

-   -   where P_(PUCCH) _(_) _(SR)(I) is the nominal, unadjusted, SR        transmission power, P_(PUCCH) _(_) _(ACK/NAK)(i,j) is the        HARQ-ACK transmission power in UL CC j and J HARQ-ACK is the        total number of UL CCs having HARQ-ACK transmission. When the        HARQ-ACK and SR transmissions can be multiplexed in the same        channel, as in 3GPP E-UTRA LTE, separate consideration of SR and        HARQ-ACK transmissions is not needed.    -   Transmission power for CQI signaling is allocated next. If        P_(MAX) is reached before the CQI signaling is allocated its        nominal transmission power, two options exist:        -   Drop the CQI transmission (which is a default if the power            for HARQ-ACK and/or SR signaling is P_(MAX)).        -   Transmit CQI with reduced power.    -   The first option is less detrimental as it is preferable for the        UE to conserve power and for the Node B to be informed that a        CQI report has been missed/dropped (for example, through        detection of the CQI transmission absence) than to receive an        incorrect CQI report or to ignore the CQI report. The second        option may be preferable when the PUCCH CQI transmission is        performed over multiple sub-frames and/or has Cyclic Redundancy        Check (CRC) protection. Then, the CQI transmission power        P_(PUCCH) _(_) _(CQI) ^(adjust)(i,k) in sub-frame i and UL CC k        is given according to Equation (16):

$\begin{matrix}{{P_{PUCCH\_ CQI}^{adjust}\left( {i,k} \right)} = {\min\left( {{P_{PUCCH\_ CQI}\left( {i,k} \right)},\left( {P_{MAX} - {P_{PUCCH\_ SR}^{adjust}(i)} - {\sum\limits_{j = 1}^{J_{{ACK}/{NAK}}}{P_{{PUCCH\_ ACK}/{NAK}}\left( {i,j} \right)}}} \right)} \right)}} & (16)\end{matrix}$

-   -   where P_(PUCCH) _(_) _(CQI)(i,k) is the nominal CQI transmission        power. In case of CQI transmissions in multiple UL CCs during        sub-frame i, if the total power remaining after the power        allocation to HARQ-ACK and/or SR transmission is not sufficient        to provide the nominal CQI transmission power in each UL CC, the        power allocation follows the same principles as in either of the        two approaches for the PUSCH power allocation.

The above principles also apply when UCI is included in the PUSCH. Ingeneral, power is allocated with highest priority to a channel withHARQ-ACK signaling, followed by SR signaling, while power for CQIsignaling is allocated with the lowest priority.

A prioritization of power allocation according to an embodiment of thepresent invention is illustrated in FIG. 12. Referring to FIG. 12, theexistence of HARQ-ACK information for transmission in the referencesub-frame is first determined in step 1210. If there is HARQ-ACKinformation for transmission either in the PUSCH or in the PUCCH, therespective power is first allocated in step 1212. No reduction in thetransmission power is applied unless P_(MAX) is reached, in which casethe transmission power of each channel, if more than one, isproportionally reduced as previously described. The allocated power issubtracted from P_(MAX) to obtain a remaining power P_(MAX) ^(rem) and,for the subsequent operation of the power allocation procedure, P_(MAX)^(rem) is set to P_(MAX), in step 1214. If P_(MAX)>0, or if there is noHARQ-ACK transmission, the power allocation process continues to step1216; otherwise, the power allocation process ends in step 1218 and noadditional channels are transmitted by the reference UE.

The existence of SR information in the reference sub-frame issubsequently determined in step 1220. If there is SR information fortransmission either in the PUSCH or in the PUCCH, the respective poweris allocated in step 1222. No reduction in the transmission power isapplied unless P_(MAX) is reached (in the method according to FIG. 12 itis assumed that SR is transmitted only through one PUCCH or in a PUSCHas part of data information). The allocated power is subtracted fromP_(MAX) to obtain a remaining power M for the subsequent operation ofthe power allocation procedure, P_(MAX) ^(rem) is set to P_(MAX) in step1224. If P_(MAX)>0, or if there is no SR transmission, the powerallocation process continues in step 1226; otherwise, the powerallocation process ends and no additional channels are transmitted bythe reference UE in step 1228.

The existence of CQI for transmission in the reference sub-frame issubsequently determined in step 1230. If there is CQI for transmissioneither in the PUSCH or in the PUCCH, the respective power is allocatedin step 1232. No reduction in the transmission power is applied unlessP_(MAX) is reached. If it is determined that power reduction is neededin step 1234, the UE determines whether the CQI transmission is CRCprotected in step 1236. If the CQI transmission is not CRC protected,the CQI transmission in the PUCCH is dropped in step 1238. If there isCRC protection, or if the CQI transmission is in the PUSCH, theallocated power is subtracted from P_(MAX) to obtain a remaining powerP_(MAX) ^(rem) and, for the subsequent operation of the power allocationprocedure, P_(MAX) ^(rem) is set to P_(MAX) in step 1240. If P_(MAX)>0or if there is no CQI transmission, the power allocation processcontinues in step 1242; otherwise, the power allocation process ends andno additional channels are transmitted by the reference UE in step 1244.

The TPC formula for the power of the SRS transmission from a UE in asingle CC can also be applied, per UL CC, for SRS transmission inmultiple UL CCs. Then, the SRS transmission power P_(SRS)(i,k) from a UEin sub-frame i and UL CC k is set according to Equation (17)

$\begin{matrix}{{{P_{SRS}\left( {i,k} \right)} = {\min{\left\{ {P_{MAX},{{P_{SRS\_ OFFSET}(k)} + {{10 \cdot \log_{10}}{M_{SRS}(k)}} + {P_{0{\_ PUSCH}}(k)} + {{\alpha(k)} \cdot {{PL}(k)}} + {f\left( {i,k} \right)}}} \right\}\;\left\lbrack {{dB}\; m} \right\rbrack}}}\mspace{79mu}{{subject}\mspace{14mu}{to}}\mspace{79mu}{{\sum\limits_{k = 1}^{K}{P_{SRS}\left( {i,k} \right)}} \leq P_{MAX}}} & (17)\end{matrix}$where

-   -   P_(SRS) _(_) _(OFFSET) (k) controls the mean received SINR at        the Node B and is provided to the UE by RRC signaling.    -   M_(SRS)(k) is the SRS transmission BW, in PRBs, in UL CC k.    -   The remaining parameters are as defined for PUSCH transmission        in UL CC k.

The TPC formula in Equation (17) is a generalization of the formula inEquation (3). However, even though P_(SRS) _(_) _(OFFSET) is aUE-specific parameter, P_(SRS) _(_) _(OFFSET) may be separatelyconfigured in each UL CC, since the Power Spectral Density (PSD) of theSRS transmission tracks the PSD of the PUSCH transmission. Also, theparameter P₀ _(_) _(PUSCH)(k) can be configured in each UL CC and theSRS transmission BW, as defined by a number of PRBs, can differ among ULCCs (for example, the PUCCH size or SRS multiplexing capacity may differamong UL CCs or the UL CCs may have different BW) and the value ofM_(SRS)(k) can depend on the UL CC k.

Regarding the SRS transmission power allocation in multiple UL CCs whenP_(MAX) is reached before the nominal SRS transmission power isallocated in each UL CC, the same approaches as the approaches describedfor the PUSCH transmission can be followed, such that, for the firstapproach, M_(SRS)(k) replaces SE(i,k) and Equation (8) is modified asEquation (18):

$\begin{matrix}{{{P_{SRS}^{adjust}\left( {i,k} \right)} = {\min\left( {{P_{SRS}\left( {i,k} \right)},{\left( {P_{MAX} - {\sum\limits_{j = 1}^{J_{0\;}}{P_{SRS}\left( {i,j} \right)}}} \right) \cdot \left( {{M_{SRS}(k)}/{\sum\limits_{\substack{k = 1 \\ k \notin J}}^{K}{M_{SRS}(k)}}} \right)}} \right)}},} & (18)\end{matrix}$while Equation (12) applies as is with P_(SRS) replacing P_(PUSCH).

The TPC operation can be extended to multiple UE transmitter antennaswherein each antenna, M∈{1, . . . , M}, has its own Power Amplifier(PA). Since the extensions of the TPC operation for the PUCCH and SRSare straightforward, for clarity and conciseness, the TPC extensionoperation for only for the PUSCH is described as follows.

Each UE transmitter antenna may have a different class of PA andtherefore P_(MAX) may depend on the UE antenna. Furthermore, due to itsposition, each antenna may experience a different path loss, andtherefore a respective measurement is required for each antenna. Theremaining parameters in the TPC formula are the same for all antennas.For UE transmitter antenna m, the TPC formula for the PUSCH transmissionpower in Equation (4) is modified as Equation (19):P _(PUSCH)(i,k,m)=min{P _(MAX)(m),10·log₁₀ M _(PUSCH)(i,k)+P ₀ _(_)_(PUSCH)(k)+α(k)·PL(k,m)+Δ_(TF)(i,k)+f(i,k)}[dBm]  (19)where

-   -   P_(MAX) (m) is the maximum transmission power from UE        transmitter antenna m.    -   PL(k,m) is the DL path-loss estimate as calculated in the UE        using antenna m.        The same value for α(k) is assumed for all UE transmitter        antennas and the PUSCH is transmitted with the same parameters        from all UE transmitter antennas.

A TPC operation for multiple UE transmitter antennas according to anembodiment of the present invention is illustrated in FIG. 13. Referringto FIG. 13, RRC configures, to a reference UE, the cell-specificparameter a(k) and the parameters P_(0,PUSCH)(k) and K_(s) in UL CC k.RRC may also configure, to the UE, the parameter P_(MAX)(m) for each UEtransmitter antenna m with a separate PA (m∈{1, . . . , M}) in step1310. The UE measures the DL path-loss PL(k,m) for transmitter antenna min step 1320 and, based on the PUSCH transmission parameters in UL CC k,the UE computes the nominal PUSCH transmission power for transmitterantenna m as in Equation (19) in step 1330.

The CL TPC commands can differ for each UE transmitter antenna, sincethe signal propagation conditions may not be correlated. Therefore, byenabling CL TPC per antenna, the overall TPC operation can be improvedand the respective formula for the PUSCH transmission power becomesP _(PUSCH)(i,k,m)=min{P _(MAX)(m),10·log₁₀ M _(PUSCH)(i,k)+P ₀ _(_)_(PUSCH)(k)+α(k)·PL(k,m)+Δ_(TF)(i,k)+f(i,k,m)}[dBm]  (20)where

-   -   f(j,k,m)=f(i−1,k,m)+_(PUSCH)(i,k,m) is the function accumulating        the CL TPC command δ_(PUSCH)(i,k,m) for UE transmitter antenna        m, which is included in the PDCCH TPC channel or in the SA        configuring the PUSCH transmission in UL CC k during sub-frame        i.

A TPC operation with different CL TPC command per UE transmitter antennam with a separate PA (m∈{1, . . . , M}) according to an embodiment ofthe present invention is illustrated in FIG. 14. Referring to FIG. 14,RRC configures, to the reference UE, the parameters P_(0,PUSCH)(k),K_(s), and α(k) in UL CC k and the parameter P_(MAX)(m) for each UEtransmitter antenna m in step 1410. The UE measures the DL path-lossPL(k,m) for each transmitter antenna m in step 1420. The UE receives theCL TPC commands for each transmitter antenna m in the SA configuring thePUSCH transmission parameters (or in a PDCCH TPC channel) in step 1430.Based on the PUSCH transmission parameters in UL CC k, the UE computesthe nominal PUSCH transmission power for transmitter antenna m as inEquation (20) in step 1440.

While the present invention has been shown and described with referenceto certain preferred embodiments thereof, the present invention is notlimited to these embodiments. Further, it will be understood by thoseskilled in the art that various changes in form and details may be madetherein without departing from the spirit and scope of the presentinvention as defined by the appended claims.

What is claimed is:
 1. A method for wireless communication by a userequipment (UE), comprising: determining a first power for transmittingfirst control information on a physical uplink control channel (PUCCH);determining a second power for transmitting both first data and secondcontrol information on a first physical uplink shared channel (PUSCH);determining a third power for transmitting second data on a secondPUSCH; reducing the third power if a sum of the first power, the secondpower and the third power exceeds a predetermined value; andtransmitting at least one of the first control information on the PUCCHusing the first power, the first data and the second control informationon the first PUSCH using the second power, and the second data on thesecond PUSCH using the reduced third power.
 2. The method of claim 1,wherein the reduced third power is less than or equal to a valueobtained by subtracting the first power and the second power from thepredetermined value.
 3. The method of claim 1, wherein the predeterminedvalue is a maximum power allowed for the UE.
 4. The method of claim 1,wherein the second control information comprises at least one of aHybrid Automatic Repeat reQuest ACKnowledgment (HARQ-ACK) and channelquality information.
 5. The method of claim 1, wherein the first andsecond PUSCHs are transmitted in respective component carriers.
 6. Themethod of claim 1, further comprising reducing the second power if a sumof the first power, the second power and the reduced third power exceedsthe predetermined value.
 7. An apparatus for wireless communication in auser equipment (UE), comprising: a controller adapted to determine afirst power for transmitting first control information on a physicaluplink control channel (PUCCH), to determine a second power fortransmitting both first data and second control information on a firstphysical uplink shared channel (PUSCH), to determine a third power forsecond data on a second PUSCH, and to reduce the third power if a sum ofthe first power, the second power, and the third power exceeds apredetermined value; and a transmitter adapted to transmit at least oneof the first control information on the PUCCH using the first power, thefirst data and the second control information on the first PUSCH usingthe second power, and the second data on the second PUSCH using thereduced third power.
 8. The apparatus of claim 7, wherein the reducedthird power is less than or equal to a value obtained by subtracting thefirst power and the second power from the predetermined value.
 9. Theapparatus of claim 7, wherein the predetermined value is a maximum powerallowed for the UE.
 10. The apparatus of claim 7, wherein the secondcontrol information comprises at least one of a Hybrid Automatic RepeatreQuest ACKnowledgment (HARQ-ACK) and channel quality information. 11.The apparatus of claim 7, wherein the first and second PUSCHs aretransmitted in respective component carriers.
 12. The apparatus of claim7, further comprising reducing the second power if a sum of the firstpower, the second power and the reduced third power exceeds thepredetermined value.
 13. A method for wireless communication by a basestation, comprising: configuring a user equipment (UE) with a physicaluplink control channel (PUCCH) conveying first control information, afirst physical uplink shared channel (PUSCH) conveying both first dataand second control information, and a second PUSCH conveying seconddata; transmitting parameters required for transmission power control ofthe PUCCH and the first and second PUSCHs; and receiving, from the UE,at least one of the first control information on the PUCCH, the firstdata and the second control information on the first PUSCH, and thesecond data on the second PUSCH, wherein if a sum of a first powerdetermined for transmitting the PUCCH by the UE, a second powerdetermined for transmitting the first PUSCH by the UE, and a third powerdetermined for transmitting the second PUSCH by the UE exceeds apredetermined value, the third power is reduced, and wherein the PUCCHis transmitted with the first power, the first PUSCH is transmitted withthe second power, and the second PUSCH is transmitted with the reducedthird power.
 14. The method of claim 13, wherein the reduced third poweris less than or equal to a value obtained by subtracting the first powerand the second power from the predetermined value.
 15. The method ofclaim 13, wherein the predetermined value is a maximum power allowed forthe UE.
 16. The method of claim 13, wherein the second controlinformation comprises at least one of a Hybrid Automatic Repeat reQuestACKnowledgment (HARQ-ACK) and channel quality information.
 17. Themethod of claim 13, wherein the first and second PUSCHs are transmittedin respective component carriers.
 18. The method of claim 13, whereinthe second power is reduced if a sum of the first power, the secondpower and the reduced third power exceeds the predetermined value. 19.An apparatus for wireless communication in a base station, comprising: acontroller adapted to configure a user equipment (UE) with a physicaluplink control channel (PUCCH) conveying first control information, afirst physical uplink shared channel (PUSCH) conveying both first dataand second control information, and a second PUSCH conveying seconddata; a transmitter adapted to transmit parameters required fortransmission power control of the PUCCH and the first and second PUSCHs;and a receiver adapted to receive, from the UE, at least one of thefirst control information on the PUCCH, the first data and the secondcontrol information on the first PUSCH, and the second data on thesecond PUSCH, wherein if a sum of a first power determined fortransmitting the PUCCH by the UE, a second power determined fortransmitting the first PUSCH by the UE and a third power determined fortransmitting the second PUSCH by the UE exceeds a predetermined value,the third power is reduced, and wherein the PUCCH is transmitted withthe first power, the first PUSCH is transmitted with the second powerand the second PUSCH is transmitted with the reduced third power. 20.The apparatus of claim 19, wherein the reduced third power is less thanor equal to a value obtained by subtracting the first power and thesecond power from the predetermined value.
 21. The apparatus of claim19, wherein the predetermined value is a maximum power allowed for theUE.
 22. The apparatus of claim 19, wherein the second controlinformation comprises at least one of a Hybrid Automatic Repeat reQuestACKnowledgment (HARQ-ACK) and channel quality information.
 23. Theapparatus of claim 19, wherein the first and second PUSCHs aretransmitted in respective component carriers.
 24. The apparatus of claim19, wherein the second power is reduced if a sum of the first power, thesecond power and the reduced third power exceeds the predeterminedvalue.